Not covering up when BF??

I am for breastfeeding and all but, how do some women feel so comfortable breastfeeding in front of people without covering up? Like, boom!! Boob out everybody looking? I will always be covered or will excuse myself and find a private place. I just do not feel comfortable exposing myself in public. I already hate having all eyes on me. I hate attention and could not see myself doing this. I understand it's not a sexual thing, but not everyone needs or wants to see that. I consider it bonding between mother and child. Not the whole damn world.